Is Dine Brands Global, Inc. overvalued or undervalued?

As of 9 November 2017, the valuation grade for Dine Brands Global, Inc. has moved from very attractive to risky, indicating a shift in investor sentiment. The company appears to be overvalued, particularly given its P/E ratio of 9, which is higher than its peer Bloomin' Brands, Inc. at 4.10, and its EV to EBITDA ratio of 7.99, which is also higher than the peer average. Additionally, the negative price to book value of -2.69 raises further concerns about its valuation.
In comparison to its peers, Dine Brands Global, Inc. has a higher P/E ratio than Jack in the Box, Inc. at 10.02, and a significantly higher EV to EBIT ratio of 9.95 compared to Bloomin' Brands, which stands at 4.53. The company's stock has underperformed against the S&P 500, with a year-to-date return of -19.1% compared to the index's 12.22%, reflecting a challenging market position.